Which of the following is a neurotransmitter that is able to bind to a muscle cell receptor and produce an action potential?
Acetylcholine
Calcium
Adenosine triphosphate
Sodium
The Correct Answer is A
a. Acetylcholine: This is the primary neurotransmitter at neuromuscular junctions. It binds to receptors on muscle cells (specifically nicotinic acetylcholine receptors) and triggers an action potential, leading to muscle contraction.
b. Calcium: While calcium ions are essential for muscle contraction, they are not neurotransmitters. Instead, they play a role in the release of acetylcholine from the nerve terminal and in the contraction process within muscle cells.
c. Adenosine triphosphate (ATP): ATP is the primary energy carrier in cells but is not a neurotransmitter. It is crucial for muscle contraction, as it provides the energy for various steps in the contraction cycle.
d. Sodium: Sodium ions are involved in generating action potentials and depolarizing muscle cells, but they are not neurotransmitters.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
a: Artificial passive - Artificial passive immunity involves the transfer of pre-made antibodies from one individual to another, such as through injection of immune serum or administration of antibodies produced in a laboratory.
b. Artificial active: Artificial active immunity is acquired through vaccination, where a person's immune system is exposed to a weakened or inactive form of a pathogen, such as the varicella (chickenpox) virus, to stimulate an immune response and the production of antibodies.
c: Natural active - Natural active immunity occurs when a person is exposed to a pathogen in the environment and develops an immune response, such as contracting and recovering from a disease like chickenpox.
d: Natural passive - Natural passive immunity involves the transfer of antibodies from a mother to her baby, such as through breastfeeding or placental transfer of antibodies during pregnancy.
Correct Answer is A
Explanation
a. Pancreas: The pancreas has both endocrine functions (releasing insulin and glucagon into the blood) and exocrine functions (secreting digestive enzymes into the small intestine).
b. Pituitary: This is an endocrine gland only, releasing hormones into the bloodstream.
c. Thyroid: This is also an endocrine gland, producing hormones like thyroxine and triiodothyronine.
d. Hypothalamus: The hypothalamus primarily functions as part of the endocrine system, regulating the pituitary gland and releasing hormones into the blood.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.